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Pesticide Toxicology Laboratory

ISU Entomology / Pesticide Toxicology Laboratory / Assessing the impact of Cry1Ab-expressing corn pollen on monarch butterfly larvae in field studies

Assessing the impact of Cry1Ab-expressing corn pollen on monarch butterfly larvae in field studies

Authors: Stanley-Horn, D.E., Dively, G.P., Hellmich, R.L., Mattila, H.R., Sears, M.K., Rose, R., Jesse, L.C.H., Losey, J.E., Obrycki, J.J., Lewis, L.
Journal, Volume, Year: Proceedings of the National Academy of Sciences, volume 98:11931-11936, 2001
Summary

The effects of three Bt corn events (event 176, Bt11, and Mon810) on survival and growth of monarch larvae were evaluated. Exposure to event 176 pollen resulted in decreased weight gain and survival. However, Bt11 and Mon810 had no adverse effects.

Comments

The registration of hybrids derived from event 176 will terminate in 2001. As a result, there should be a significant reduction in risk to monarchs. However, as the authors suggests, additional studies are needed to examine the lifetime and reproductive impact of Bt11 and Mon810.